LIST OF PLATES. 
Plates I—V (Tunicata) 
Plates VI—IX (Oligochaeta) 
Plates X—XII (Mollusca) 
Plates XIII—XXX (Aphididae) 
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34 
108 
126 
274 
Plates VI—VIII (Crustacea Entomostraca : Zoology of the R.I.M.S. 
‘Investigator ’) 
132 
